How to counter Mars in Dota 2

Mars throws his legendary Spear with deadly precision, damaging each enemy unit it strikes. The first enemy hero it hits is skewered on the spear, pushing it back. If a skewered hero hits a tree, building, or cliff, they will be impaled to it and stunned.

Mars smashes enemies in front of him with his shield, knocking them back and damaging them with a critical hit based on his attack. Bonus damage is added when hitting heroes. Has True Strike.

Mars wields his massive shield to block a portion of each physical attack when hit from the front or sides. Can be toggled, granting phased movement, removing Mars's ability to attack, and locking the direction he is facing. When active, reduces movement speed and re-directs 70% of the attack projectiles aimed at allies towards himself.

Mars gets more HP Regen the more he is outnumbered by enemy heroes in 700 radius.

After a short formation time, Mars summons an arena lined with the undead warriors of the Ash Legion, who block enemy attacks and movement. Enemy heroes near the inside edge of the arena will be attacked by spears, dealing damage and knocking them back.